Spring regulator



F. W BOLD SPRING REGULATOR Oct. 13, 1925- Filed Jan. 2, 1925 Patented Oct."13, 1925.

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PEARSON, OF BROOKLINE, MASSACHUSETTS.

SPRING: REGULATOR.

Application flied January 2, 1825. 861181 No. 286.

To, all whom. it may concern:

. Be it known that I, FREDERICK W. Born, a citizen of the. United States, and a res1- dent ofOhel'sea, in the county of Suffolk and State of Massachusetts, have lnvented an Improvement in Spring Regulators, of

i i which-the following description, in connection with the accompanying drawings, is

" a specificatiom like letters on the drawings tors,and more particularly to a reg re resenting like parts.

present invention relates to relgulaator for use in connection with the controlling spring ofmechanical time fuses.

An important element in connection with mechanical time fuses is the controlling spring for controlling the movement of the oscillatory allet associated with the timing train he timing train mechanism 1n a mechanical time fuse must be exceedingly rugged in character and yet all workin parts must cooperate so accurately an sensitively as tomeasure time intervals within extremely close limits in order thatthe time of detonation of a fuse may be accurately predetermined. The timing train mechanism is controlled by, ordinarily, an

oscillatory jallet which, in order to avoid thetdisturbing effects of centrifugal force set up by the rotation of the fuse in its field, is mounted in the axis of the fuse.

HIt 'is customary, therefore, to employ a straightflength of sprin for controlling the oscillatory pallet an the question of regulating the same becomes of prime in1- portance. Such regulating device should I be relatively simple in character and positive in operation and must not be disturbed by mechanical jars, shaking of the fuse, or any other ordinary. disturbing influence.

' No regulator of which I am aware has all these desirable features and it is, therefore,

an object of the presentinvention to perfect a regulating device of this character.

In carrying out my invention I provide a, bridge member in which is rotatably mounted a threaded shaft and associated with such shaft, with the bridge, and with the controlling spring is a saddle which slidably enga with the controlling spring es and is movafile longitudinally thereof to alter the effective length of such spring.

. In the accompanying drawings llustratmg the preferred embodiment o my invention,

alignment with each other and these slots Fig. 1 is a plan view of one of theplates of a timing train;

Fig. 2 is an end elevation of the regulatmg mechanism, and

Fig. 3 is a side elevation of such mechanism.

Referring to the drawings, 10 designates a late of a timing train in which is rota-' ta ly mounted a staff 11 and on which the usual oscillatory pallet (not shown) ismounted. The upper end of this staff 11 is slotted to receive the controllin s ring 12, a wedge 13 associated therewithrmly locking such controlling spring 12 in position. One end of the spring is confined by stops 14 secured in the plate 10, and the other end of the spring 12 passes through a slot 15 in a saddle 16.

Numeral 17 designates a bridge having formed integral therewith and extending 75 laterally outward therefrom at each en projections 18. The bridge 17 is secured to the plate 10 by screws 19. The projections 18 are provided with slots or grooves 20 in or grooves form bearings for a regulator screw 21. This regulator screw-is reduced in diameter adjacent to the slotted head thereof and at the end in order to fit into the bearing slots 20. Also the shoulders formed at the head end of the adjustin screw 21 prevent longitudinal movement 0 the same in the grooves or slots 20. The adjusting screw 21 lies arallel to but spaced apart from, the bridge 17, and that portion thereof between the projections 18 is threaded, as shown. Mounted on the adjusting screw 21 so as to be engaged b the threads thereon is a saddle 16 whic as stated above, is provided with a slot 15 that 96 slidabl engages with the spring 12. The lower ace of the saddle 16 en a es with the top face of the plate 10 an t e rear end of the saddle engages with the bridge 17 and in this manner rotative movement of 0 the saddle 16 about the adjusting screw 16 1s prevented. The head of the adjusting screw 21 is slotted so that the same may be rotated by means of a screw driver, and in this manner the saddle 16 moved lon itudi 5 own) after each displacement thereof is 110 also altered. Further, there is no danger of a jarring action on the art of the mechanism rotatin the adjustmg screw 21 to thereby accident y move the saddle 16 on the spring 12. By my device, therefore, I positively and accurately adjust the effective length of the pallet controlling spring in a simple, positive, and expeditious manner.

While I have necessarily shown and described the preferred embodiment of my invention somewhat in detail, it is to be understood that I may vary the size, shape, and arrangement of parts within wide limits without departing from the spirit of v the invention.

Havin thus described my invention,

bridge, lateral extensions formed integral therewith and at each end thereof, an adjusting screw rotatably mounted in said extension, a saddle associated with said screw and movable longitudinally thereof by the rotation of the screw, and a sprin said saddle being slidably engaging wit said 

